raymond



(No Modem' 3 Sheets-Sheet 1.

Gr. 81: A. RAYMOND.

GrIfINDIlIGr MLL. No. 295,049. Patented Mar; 11, 1884.

'all

(No Model.) 3 Sheet-Sheet 2.

G. 8v A. RAYMOND.V

GRINDING MILL.

No. 295,049. Patented Mar. 1l, 1884.

N. PETERS, mcbrmyzpm. wasninmm'n. C.

(No lModel.) v3 Sheets-Sheet 3.

G. 8v A. RAYMOND.

GRINDING MILL.

No. 295,049. Patented Mar. l1, 1884.

Idd.. fr..

N. PETERS, Pham-Langman Wemmel-.11 c.

iinrrnn Sterns Parenti* @einen GEORGE RAYMOND AND ALBERT RAYMOND, OECHICAGO, ILL., ASSGNORS OF ONE-HALE TO ORVILLE H. TOBEY, OE SAME PLACE.

eRlNDlNe-MILL.

SPECIFICATION foi-ming partl of Letters Patent No. 295,049, dated March11, 1884.

Japplication filed January 17, 1883.

To @Zlio/hom t may concern,.-

Be it known that We, GEORGE RAYMOND and ALBERT RAYMOND, of Chicago, inthe county of Cool; and State of Illinois, have invented certain newrand useful Improvements in Grinding-Mills, of which the following is aspecification.

The object of the invention isl to produce a simpleV andcheaply-'constructed niill adapted for the reduction of grain, oats, andother granular substances, and which may also be adapted at will fordividing cornstalks, cane, or similar material'into shortlengths, andsubsequently reducing the saine by grinding.V i To this end theinvention relates to an improved construction ofthe grinding apparatus,as hereinafter explained in detail, and tothe combination therewith of amechanism of a peculiar construction to effect the division or partialreduction of the stalks and similar material previous to their enteringthe grinding mechanism proper; also, to the peculiar construction andarrangement of interchangeable feed mechanism for use in operating upondifferent materials.

Referring to the accompanying drawings, Figure l represents a verticalcentral section through our improved millon thelinewx ofFig. 2. Eig. 2is a top plan View ofthe mill with the upper shaft-bearing and thecovering of the cutter-head removed to expose the cutter-head andefr-operating parts to view. Fig. 3 is a horizontal section onthelineyyof Fig. 1; Fig. 4 is aside elevation of the mill, one ofthestandards of the main frame being broken away to exp ose the pulleys fordriving the feed mechanism. Eig; 5 is a top plan View ofthe mill and thehopper with the reciprocating feed devices therein. Fig. 6 is a vertical`section of the same with the reciprocating feed devices .replaced by afeed-screw or Worm. Fig. 7 is a bottom plan vieur of the plate by whichthe lower grinding-disk is carried. Fig. Sis an end view of the devicesemployed upon the hopper to sustain the feed screw, crank-shaft, anddriving-pulleys. Fig. 9 is a perspective vieuT of one of the duplicateboxes or bearings in which the main shaft or spindle is sustained.

A' represents the main frame, preferably 5o cast complete in one piece,consisting of a flat base-plate, a, three tubular standards, b, there-(No model.)

on, and a horizontal top plate, c, sustained by the standards. This topplate, c, is constructed with a central opening to permit the passage ofthe driving-shaft, and with an annular recess or depression, d, in itsupper side to form a meal-chamber, the meal being delivered from thischamber through adeliveryspout, e, extending downward from the underside, as plainly represented in Fig. l.

Upon the top plate, o, of the main frame We mount a hollow curb orcasing, B, designed to cover` and inelose the grinding-disks, thiscasing consisting of a circular top plate having at its periphery adepending rim, the l ower 6 5 flanged edge of which is seated upon andbolted to the top plate, as shown. The, curb B has formed upon itscenter a hollow upright head or turret, h', designed to receive acutter-head, hereinafter described, this turret being cov- 7o eredbyacap-plate, i, bolted rmly thereon, as shown, and being provided in oneside with a mouth or inlet-opening, through which the materials areintroduced into the mill.

C represents the main shaft or spindle of the mill, located centrallyand vertically in the main frame, with its lower end seated in a step orbearing, D, supported by a bridgetree, E, the details of which will behereinafter described. vAt itsV upper end the shaft is 8o sustained in abox or bearing, E, supported in a central hub or enlargement on the.capplate, as clearly shown in Fig. l. It will be observed that the mainshaft is thus sustained at its two extremities, whereby it is given abetter support and greater rigidity when in action than those shaftswhich have the grinding-disk attached to the end overhanging thebearing. The boxes or bearings of the shaft are constructed, as shown inFig. 9, of a sphe- 9o roidal form on the exterior, and are seatedloosely in cylindrical recesses, this construction permitting the boxesto adj ust themselves in exact alignment with the shaft.

G and H represent the two horizontal grinding-disks, constructed in anannular form, and in ordinary eases duplicates of each other, withgrinding-teeth .Of any approved forni upon their opposing faces. Theupper disk, G, is bolted firmly to the under side of the roo curb orcasing D, as shown in Fig. l, and remains rigidly in position therein.The lower y sesame disk, H, on the contrary, is bolted to a horil zontalplate, I, clearly represented in Figs. 1 and 7, which is keyed orotherwise secured firmly to the main shaft within the curb or casingimmediately above the top plate, c, of the main frame, so that therotation of the main shaft imparts a corresponding motion through theplate I to the grinding disk or ring II. The parts are so proportionedrelatively to Aone another that the meal flowing from the margin of thelower grinding-disk may pass freely into the meal space or chamber dbeneath the plate I, and thence through the delivery-spout.

To facilitate and insure the delivery of the meal, the disk I hasdepending arms or blades- 7c formed on its under side as shown in Figs.1 and 7, the outer ends of these blades being extended upward past theouter edge of the lower grinding-disk.

.For the purpose of preventing the escape of the meal around the centralshaft or its contact therewith, the top plate, c, of the frame isprovided with an upturned flange, Z, encircling the shaft and extendingupward within a corresponding annular iiange, n, formed on the underside of the plate I.

As a means of imparting motion to the spindle or shaft, we securethereon al driving-pulley, J, which is preferably cast in one piece withthe disk I, as shown in Fig. l, this construction causing the power tobe applied directly to the disk, and also giving to the disk increasedstability and stiffness.

The parts above described constitute a complete disk-actiongrinding-mill. Material introduced into the shaft of this mill throughthe turret will pass centrally downward through the upper grinding diskG, and thence outward b etween the surfaces of the two disks, beingdelivered to the spout, as before explained.

In order to adapt the mill for reducing cornstalks, sugar-cane, cornupon the ear, and similar materials which cannot be reduced by theaction of grinding-disks alone to the form of flour or meal, we providean auxiliary cutting mechanism to act upon the materials previous totheir entrance between the disks.

This cutting mechanism consists, essentially, of a spiral fluted head,M, secured upon the upper portion of the main shaft C within the head orturret h, and provided with a series of upright spiral blades or knives,N, which are bolted rmly thereto, with their'edges exposed at theperiphery in such manner as to eo-operate with a fixed upright blade, q,bolted to the interior of the head h at one side of the feed mouth orinlet, as plainly represented in Figs. l and 2. rIhe edge of the knifeqextends slightly within the turret lor chamber in such position .thatthe edges of the knives N pass closely thereby, the knives being thusadapted to act with a shearing action upon the stalks or other materialsintroduced between them. The position of the inlet-mouth, as shown inFig. 2, is such that thematerials enter the chamber or turret at oneside, owing to which fact, and to the direction in which the knivesrevolve, the mill tends to draw or feed the material inwardautomatically.

In order to arrest or check the inward motion of the stalks,so that theymay be properly divided by the knives, and for the purpose of retardingor retaining the pieces after their severance from the stalk in suchmanner that they may be further reduced by the rotary knives, the turretis constructed with upright ribs or teeth t upon its interior surface,as clearly shown in Figs. 1 and 2.

Vhile it is not absolutely necessarythat the knives N shall be placedspirally upon the head M, this arrangement is provided for the reasonthat they then act as feeders to assist inearrying the material downbetween the grinding-disks, thus avoiding the necessity for specialdevices for the purpose.

vHaving described the leading features ofthe mill, we will now describecertain -minor feav.

ing to receive the lower portion of a cup orv socket, R, in which theshaft-box or bearing l' proper is mounted, the upper end of the cupbeing provided with a peripheral fia-nge, supported by knife-edgebearings on the-two sides of the bridge-tree, as usual. this arrangementpermitting the socket to remain vertical as the bridgetree is adjusted.The lower end of the cup or socket R is seated and arranged to slidevertically in a tubular sleeve or hub, designed to hold the socke't frommoving laterally, a-nd thus'keep the shaft in exact alignment withoutbeing adjusted. rIhe socket -is provided with an enlarged iiangeorbas'eplate, mounted upon the base-plate ofthe ma chine in such manneras to be adjustable laterally, in order to move the lower end of theshaft, as may be required. In order to bring the faces of thegrinding-disks parallel with each other, the base-plate of the socketrests upon the base-platea of the main frame,- and is provided withradial slots s to receive clamping-bolts t, as plainly represented inFigs. l and '3.

As a means of effecting the lateral adjustment of the socket-plate andsecuring the same in position, a series of horizontal screws, u, areinserted through the base-plate of the main frame from its outer edgeinward, their inner ICO IIO

ends being threaded into lugs formed for the described, and is coveredby a plug secured therein, above, as shown in Fig. l, the detachment ofthis plug, affording access to the bearing and'permitting its removal atwill.

ln order to adapt the mill, constructed as above, for the treatment ofthe different inaterials for which it is adapted, it is necessary toprovide a convertible feed mechanism, which will now be described. Theturret or feedchamber It at the top of the mill is provided at the edgesof its openings with vertical ilanges fr', plainly represented in Figs.2 and 4. When the mill is to be employed for eutting and grinding caneand similar material, we make use of an inclined flaring spout ortrough, "W, open at its outer end to admit of the cane'being passedendwise through the same. The inner end of this hopper is provided witha metal mouth or throat, b', adapted to be bolted to the flanges c', asrepresented in Figs. 2- and 4, this mode of attachment holding thehopper firmly to the mill and sustaining it in position thereon. Vhenthe mill is to be employed for reducing grain and similar materialswhich require a hopper to hold them, the spout or trough "W is removedand a hopper, such as represented in Figs. 5 and 6. applied in itsplace. As shown in Fig. 5, this hopper is constructed with inclinedsides d', converging at the bottom, and provided with rem ovableinclined end boards, e', secured therein by screws f. Then these endboards are in position, the hopper inclines inward from all sides to thenarrow throat or opening at the bottom; but when they are removed y theends of the hopper are vertical and the sides only inclined, a longtrough or channel being formed at the bottom. One of the removable endboards e is provided witha `sliding gate, g', seated at its edges inguides h. A hand-screw, i', serves, by raising and lowering the gate, toregulate the size of the outlet-opening, and thereby the rate of feed. Ahorizontal slide, j', is provided with an operating-pitman, k, andconnected to acrankpin on a pinion, Z', secured, as shown in Fig. 6, onthe upper end of a vertical shaft, m. This shaft is sustained in a metalbracket, n', attached to the outer end of the hopper, and is providedwith a cone-pulley, o', driven by a belt, p', from a correspondingpulley, g', on the upper end of a vertical shaft, r'. The last-mentionedshaft is yseated in bearings in the main frame, as shown in Figs. 3, 4,and 6, and is driven by means of pulleys and a belt, s', from a centralpulley on the main shaft, as shown. By this arrangement the feed-slideis caused to reciprocate beneath the throat of the hopper, its endserving to drive the material forward therefrom into the head of themill. The inner end of the hopper is provided with a flanged head orcasing, t, adapted to he bolted to the head or turret, whereby thehopper is maintained in position.

The above-described arrangement answers a good purpose in feeding thosematerials which will flow downward in front of the slide 5 from thehopper and place horizontally in the A bottom thereof a feed-screw, a',clearly shown in Fig. 6, This screw or worm is sustained at one end in aplate, c', bolted to the hopper, and at the opposite end in a plate, w',also secured to the hopper. The plate w' is removable, in order topermit the withdrawal of the worm at will and the substitution oftheslide in its place. The form of this plate and the manner in which itissecured to the hopper by screws y beari n g against its edges areplainly represented in Fig. 8, the screws being seated vin the platewhich gives support to the vertical shaft before mentioned. Thebridge-tree E is sustained at one end hy means of 'a rod, f, the upperend of which is passed through the top plate, c, and through the rubberspring g thereon, and provided with a washer and nut, Il, at the upperend, this arrangement serving as ari-elastic or yielding suspension forthe bridge-tree., At its opposite end the tree is suspended and adjustedby a rod, e, the upper end of which is threaded and passed through thetop plate of the frame and provided with a hand-nut, '11", by turningwhich theend of the rod may be raised and lowered.

' The rod e" is also provided immediately below the top plate of theframe with check-nuts j, which, being properly adjusted, bear beneaththe plate and limit the upward 'motion of the rod, thus preventing thebridge-tree from rising so far as'to force the grindingdisks intocontact with each other. The application of the nuts j is advantageousnot only in preventing the destruction of the mill by keeping the disksout of contact, but also in that they enable the operator, after havingseparated the disks for any reason, (such, for example, as the removalof foreign matters,) to instantly bring them back preciselyto theiroriginal adjustment. Wereit not for the presence of the nuts, it wouldbe necessary for the operator to turn the screws e'. and elevate thelower disk with extreme caution requiring the expenditure of unnecessarytime and the ernployment of skilled labor.

Having thus described our invention, what we claim is 1. In a machinefor reducing cane and similar materials, the grinding-disks, incombination with the rotary cutter-head provided with external knives,the head or turret having the throat orinlet, andthe stationary uprightblade located at the side of the throat and arranged to act in immediateproximity to the rotary blades, as described, whereby the stalks arefirst divided by a shearing action into lengths and subsequentlysubjected to a grinding action.

2. The head or turret 7i, provided with :internal ribs and with a feedthroat or opening, in combination with the upright knife secured to itsside and the cutter-head provided with IOC IIO

blades N, arranged to move in close proximity to the fixed blade, but ata distance from the ribs, whereby the ribs are adapted to check theinward motion of the cane or other material during its severance by theknife.

3. In combination With the rotary head having the upright knivesthereon, the encircling turret provided with internal ribs, a knifefixed at one side of the inlet-opening, and the feed spout or throatarranged to deliver the material at one side of the rotary head, wherebythe stalks are caused to be drawn automatically inward and their advanceretarded, so that they may be severed by the knives.

4. In a convertible hopper for a grinding inill, the body provided Withmovable end boards, e', substantially as described, Whereby it may beadapted at Will for use With a reciprocating slide or With a feed-Worm.

5. In combination with the shaft bearing the socket, the base-plate a,adjustable plate S, and the bolts t and u.

6. The hopper provided with the removable end boards, e', and with thepinion Z, having a crank-pin thereon, whereby it is adapted foroperation in connection with a Worm or with a reciprocating slide, asoccasion may require.

7. The hopper d, provided at one end with the outlet-opening and thedepending plate o',

l in combination with the feed-Worin a', the Worin-supporting plate w',and the screws for securing said plate in position.

8. In combination with the lower grindingdisk, its spindle, and thebridge-tree, the suspension-mdf, and the spring to sustain the same, thesuspension-rod e, and its nuts i and j.

GEORGE RAYMOND. ALBERT RAYMOND.

\Vitnessesz HENRY S. ToWLn, vlhneDnRIcK G. GOODWIN.

